Jordan engine



Aug. 28, 1928.

H. R. HARRIGAN JORDAN ENGIE Filed May ll, 1926 2 Sheets-*Sheet lINVVENTOR BYLJJ ATTORNEY Aug. 28, 1928.

H.l R. HARRIGAN JORDAN ENGINE Filed Mavy ll, 1926 2 Sheets-Sheet 2lNvNToR BY H l5 ATTORNEYS Patented Aug. 28, 1928.

UNITED Y STATES PATENT OFFICE.

HERMAN R. HARBIGAN, 0F HOLYOKE,'MASSACHUSETTS, ASSIGNOIB. T0 E U. JONES'& SONS G0., OF PITTSFIELD, MASSACHUSETTS, A` CORPORATION 0FMASSACHUSETTS.

. JORDAN ENGINE.

' Application mea nay 11,

This invention relates to certain im rovements in grinding bararrangements or the shell or stationary element of a refining engine ofthe Jordan type.

These Jordan refining engines include a stationary shell and acooperating core or plug which is mounted to rotate in the shell. TheseJordan engines are tapered and the stock to be refined is fed in from asuitable hopper through the small end of the shell, being dischargedthrough the large end. The interior surface of the shell is providedwith grinding elements in the form of bars which are spaced apart andseparated by strips of suitable material, usually wood. The core or plugis also provided with cooperating grindin bars or blades separated bystrips of suitab e material, such as wood.

In assembling the shells of these Jordan engines, as ordinarilyconstructed, the grinding elements are usually arranged in the shell insectional form, that is, the grinding bars are arranged in three or moresets longitudinally of the shell, the bars of each set being of the samelength and the wood or filler strips between the bars are Ythe samelength in each section.

In Jordans constructed in this way, at the circular -joint between anytwo of the sections, there are voids or small spaces where the ends ofthe bars do not touch or the ends of the wood fillers between the barsdo not quite touch. In refining certain stock, particularly long fibrestock, if a fibre catches in one of these voids others adhere to it andfinally a mass of fibre, known in the trade as a string, is formed whichis liable to pass out of the discharge end of the engine without beingrefined or torn to pieces. These lumps or strings are very annoying tothe paper maker because whenever one goes on the screen of the papermaking machine and into the sheet, it produces what is called a lump andwhen the sheet passes through the calender rolls of the papenmakingmachine this is crushed and forms a weak point with the result that thissheet has to be thrown out. Furthermore, dirt is apt to accumulate inthese interstices and give trouble.

In the construction of these Jordans, as ordinarily effected, the numberof the knives is preferably increased as from the small to shown in Fi1926. Serial No. 108,437.

the large end of the machine, the small number of knives at the smallend being employed so as to provide free entrance and ,circulation ofthe stock at the beginning of the refining operation. The increasednumber of these knives longitudinally of the shell causes certain of theknives to lie between others with no other knife ahead of them againstwhich they can a'but. This construction also tends to produce strings,the fibres lodging against the ends of these knives.

It is the chief object of the present invention to produce anarrangement of grinding bars for the shells of refining engines of theJordan type which will prevent or reduce to a minimum the formation ofthese strings v or lumps so that the stock will pass through therefining engine in the condition in which the production of imperfectsheets and this string trouble is eliminated.

It isa further object of the invention to produce an improvedconstruction for a filler for shells of this type in which, as theknives wear down, the filler block may be removed so as to present afresh grinding bar surface.

With these and other objects not specifically referred to in view, theinvention consists incertain novel parts, arrangements and combinationswhich will be described in connection with the accompanying drawings andthe novel features pointed out in the claims hereunto annexed.

In these drawings,- Y,

Figure 1 is a more or less diagrammatic, partly sectional, elevation ofa Jordan engine embod 'ngthe invention;

Fi re 2 1s a section taken on the line 2-2 of Figure 1, looking in thedirection of the arrow, showing one arrangement of bars and plug whichmay be employed; x

Figure 3 is a partially broken away end view of one form of the improvedshell;

Figure 4 is a gian view of the bar arrangement shown in igure 3;

Figure 5 is a sie view of the arrangement Figure 6 1s a plan view of amodified arrangement of the bars which may be adopted Figure 7 is adetail showing one grouping of the bars which may be used; X

Figure 8 is a detail showing a different grouping or arrangement of thebars;

Figure 9 is a detail end View of an improved filler which may beemployed between the grinding bars;

Figure 10 is a side view of the construction shown in Figure 9;

Figure 11 is an end view of a modified form of filler-block; and

. Figure 12 is a side view of a Construction showing the. filler blockoverlapping the end of a'bar.

Referring now to these drawings, the invention has been illustrated asemployed in a refining engine of the Jordan type which has beenconventionally illustrated. yArs shown, this engine includes astationary outer .shell 1 suitably supported on standards 2 rising fromthe floor or any other suitable base 3. This shell, as. shown, istapered and at its small end opens into a feed chamber 4 to which thestock to be refined is fed from a hopper 5. The stock is deliveredthrough an exit port 6 formed in a head 7 secured to the large end ofthe shell. Cooperating wlth this shell is a core or plug 8, this core orplug being supportedon a shaft 9 driven from any suitable source ofpower, indicated as a pulley 10. The shaft has its bearings at l1, 12 inframes 11A, 12A, supported ,on standards 13,

' 14. The shell is provided with grinding ele- 3oy .the core or plug isprovided with cooperating ments inthe form of bars or blades l5 andgrinding elements shown as bars or blades 16, these bars or bladescooperating with the bars 15 to refine the stock as it passes throughthe engine from the small to the large end. These bars' wear down afterthe machine has been used and in the best constructions means areprovided by which the plug may be shifted endwise in the shell so as toalways have the bars in correct grinding engagement, this beingaccomplished in the usual manner by means-of a hand wheel 17 and screwand nut construction 18.

Iif accordance with, the invention, .an improved arrangement and form ofgrinding ars is provided for the shell 1, these bars being arrangedsofas to prevent or reduce to a minimum the formation of strings orlumps in the stock, or the collection of dirt. While the invention maytake various concrete embodiments, the construction selected toillustrate the invention has been found to have good resultsin practiceland will be described as illustrative of a preferred means for carryingthe invention into effect.

In carrying out the invention, the bars are so arranged'that certain ofthe bars run the lfulllength ofthe shell and others of the bars areof alength less than the' full length of the shell. With this arrangement,there isa shorter ,bar with a longer bar on each side thereof, theshorter bars being arranged toward the large end of the shell. Referringfirst to the construction shown in Figures 3 to 5, there is provided anarrangement of long bars 19 which extend the full length of the plug,these bars being bent at points indicated at 20 to give them the desiredcon-- The. bars 2l in this figure are half the length of the shell. Itwill be observed that there are channels 23 formed between the long barsand that these channels are divided by the short bars int-o narrowerchannels 24, so that a good circulation of the stock through the machineto its discharge is effected. To prevent the fibres of the stock fromcatching on the ends of the short bars, these ends are bevelled, asindicated at 25 in Figure 5, and preferably the ends of the long barsare also bevelled, as indicated at 26. This beveling, it willbeobserved, slopes from the intake or small end of th-e shell toward thelarge end of the shell. The bars are bevelled to a plane level with orslightly below the working surface of the iiller strips, indicated at27, which are interposed between the bars and which space them apart. Inthis construction, the pulp or stock has a smooth incline to ride overand there are no points longitudinally of the shell at which the stockcan gather or collect.

In the best constructions, certain bars, known as guide or rail bars,are provided which extend the length of the shell, one of these bars,marked 50, being shown in Figure 3. Where these rail bars are employed,a grinding bar, as 19, extending the full length of the shell, will bepositioned on each side of these bars.

Referring to Figure 6, a somewhat different arrangement of the grindingbars is illustrated. In this arrangement, there areV provided three setsof bars longitudinally of the shell. As in the construction shown inFigure 4, there is provided a series of long bars 28 which extend thelength of the shell, a series of intermediate bars 29 which eX- tendtwo-thirds the length of the shell, and a series of short bars 30 whichextend approximately one-third the length of the shell. The bars 29 are,as in the construction shown in Figure 4, spaced from the bars 28, theshorter bars 29 and 30.both being spaced Ifrom the bars 28. The bars inthis arrangement are, as shown, bent Aat suitable points, indicated at31, and these bends in the bar are preferably opposite each other, asshown. The bars can be arranged in the shell in various ways, eitherwith a filler 27 between each bar, as in Figures 4 and 6, or the barsmay be arranged in various groups or clusters, and two such groupingsare illustrated in Figures 7 and 8. Referring to these figures, andfirst to CIV ifillers 37.

Figure 7, it will be seenjzhat, considering the arrangement as around.the shell, the bars are arranged in clusters of two and these clustersof two canl be arranged in groups. As shown, there isprovided a plainbar 32 and a bar 33 having a shoulderfindicated at 34, sor as to leave aspace 35 between the bars. These clusters are separated by spacers orfillers, shown as of wood, 36 and the bars may be divided into 'groupsby wide spacers or Of' course, the cluster could be made up of twolplain bars with a narrow filler strip or in any desired way. A

Referring to the construction shown in Figure 8, there is shown a groupof bars oo mprising clusters of two bars, indicated by the numeral 38, agroup of -bars including a cluster of three bars, indicated by thenumeral 39, and a groupof bars including clusters of three, four. andfive bars, indicated by the' numeral 40. It will be understood, ofcourse, that this grouping and arrangement of bars is merelyillustrative Aand the invention in its broad aspects is not conned toany articular grouping or arrangement` of t'he ars.

As the engine is used, these grinding bars wear down and, to present asufficient height of `bar for proper rening action, the wooden spacersor llers' have to be lowered. A spacer or filler is preferably providedby which this can be done very quickly, the spacers being formed withportions which may be removed with' a suitable tool while the spacersare in position. While this may be elfected in various ways, two suchways are shown in thedrawings. Referring first to Figures 9 and 10, thespacer is shown as having. a built-up portion formed of layers which canbe removed. As illustrated, the spacer 41 spacing two bars 42, 43, hasthree removableflayers 44 which are glued or otherwise removably securedtogether. When it lis desired to reduce the thickness of the spacer, itis simply. necessary to insert the tool and pry off one of these layers44.

Referring to Figure 11, a' spacer 45 is shown` the top portion of whichis grooved, as indicated at 46. When it is desired to reduce thethickness of this spacer, it is simply necessary to chip olf one of thelayers 47 by means of a suitable tool.

As before stated, the bars are preferably bevelled down to or slightlybelow the point where the shell filling is practically worn out. Thewood spacers are therefore formed, as indicatd at 48 in Figure 12, sothat they will overlap on the ends of the bar. Thus no pockets or voidsare formed which will catch the fibres of the stock and form strings, orallow the'acc-umulation of dirt.

The filler or spacer bars may be the length of the shell. In thesimplest construction,

however, they preferably are sectional, as' inv dicated in Figure 6,that is, the ends of these spacers can be made so as to closely abut andprevent the formation ofvoids or tween the ends thereof. Y

While the invention has been shown and described in its preferred forms,it will be pockets be- 'understood that various changes and arthe shelland extending toone end thereofl and located between the longer bars,filler blocks separating certain of the bars,the ends of the shorterbars being acutely bevelled in the direction of the passageof stockthrough' the shell, a core or plug cooperating with the shell, and meansfor effecting a relative adjustment of the core and shell.

2. In a refining engine, a shell provided with grinding bars extendingthe length of the shell, other grinding bars shorter than the length ofthe shell extending to one end thereof and located between the longerbars, other grinding bars shorter than the second bars located betweenthe second bars and extending to one end of the shell, filler blocksseparating certain of the bars, the ends of the bars shorter than thelength of the shell being acutely bevelled in the direction of thepassage of stock through the shell, a core or plug cooperating with theshell, and means for effecting a relative adjustment of the coretheshell, other grinding bars shorter than' the shell and extending to oneend thereof and located between the longer bars, filler blocksseparating certain of the bars, the ends of the shorter bars beingacutely bevelled in the direction of the passage of stock through theshell and to a point level with or slightly below the working surface ofthe blocks, a core or plug cooperatinnr with the shell, and means foreffecting a ielative adjustment of the core and shell.

4. In a refining engine, a shell provided with grinding bars extendingVthe length of the shell, other grinding bars shorter than the shell andextending to one end thereof and located between the longer bars, othergrinding bars shorter than the second bars located between the secondbars and extending to one end of the shell, vfiller blocks separatingcertain of the bars, the ends of the shorter bars being acutely bevelledin the direction of the passage of stock through the shell and to apoint level with or slightlybelowr the Working surface of the blocks, acore or plug cooperating with the shell, and means for effecting arelative adjustment of the core and shell.

5. In a rening engine, a shell provided with grinding bars extending thelength of the shell', other grinding bars shorter than the shellarranged between the long bars and extending to one end of thevshell,said bars being formed with bent portions which coincide, the. ends ofthe shorter bars being acutely bevelled in the direction of the passageof stock through the shell, filler blocks yseparating certain of thebars, arcore or plug cooperating .with the shell, and means foreffecting a relative adjustment of the core and shell.

6. In a refining engine, a shell provided with grinding bars'extendingthe length of c.

the shell, other grinding bars shorter than the shell arranged betweenthe'long bars and extending to one end thereof, other bars shofrter thanthe second bars arranged between the second bars and extending to theend of the shell, the ends of the shorter bars being bevelled in thedirection ofthe passage of stock through the shell, the bars beingformed-with :bent portions which coincide, filler blocks separatingcertain of the bars, a core or' plug cooperating with the sliellrandmeans-for effect-ing a relative adjustment of the core and'shell.

7. In a refining engine, a shell provided V with grinding bars extendingthe length of the shell, other grinding bars shorter than the shell andextending to one end thereofl and located between the longer bars, andfiller blocks separating certain of the bars and having removable layerslapping the ends of theshorter bars..-

8. A grinding shell for refining engines comprising grinding barsofilifferent lengths,

the groups of bars, the ends of the shorter bars being bevelled inthedirection of the passage of stock through the shell, a core orplugcooperating with the shell, and means for effecting a relativeadjustment of the core and shell.

1'0. In a refining engine, a shell provided with grinding bars extendingthe length of the shell, `other grinding bars shorter than the shell andextending to one end thereof and located between the longer bars, othergrinding bars shorter than the 'second bars `located betweenthe-s'econdbars and extending to the same end of the shelltsaid bars being arrangedin groups or sets circumferentally of the shell, filler blocksseparating the groups of bars, the ends of the shorter bars beingbevelled in the direction of the passage of stock through the shell, acore or plug cooperating with the shell, and means for effecting arelative?J adjlistment of the core and shell.

In testimony whereof, I have hereunto set my hand. Y

HERMAN R. HARRIGAN.

